(AP Photo/Alex Sanz) U.S. Representative John Lewis, Democrat of Georgia, is co-sponsoring, with Rep. Keith Elison of Minnesota, legislation that would broaden the Civil Rights Act to include workers who are discriminated against for wanting to join a union. Lewis, shown here on December 22, 2014, discusses the historical film Selma and civil rights in the United States during an interview in Atlanta. Forty-nine years after Lewis and other marchers tried to cross the Edmund Pettus Bridge in Selma, Alabama, memories of "Bloody Sunday" are still vivid in his mind. It was one of the defining moments of the civil rights era. This article is published as part of " American Labor at a Crossroads: New Thinking, New Organizing, New Strategies ," a conference presented on January 15, co-sponsored by the Albert Shanker Institute, The Sidney Hillman Foundation, and The American Prospect . (View agenda here .) Find our Labor at a Crossroads series here . O rganized labor, which represents only 1...